Electric-lamp socket.



R. B. BENJAMIN,

ELECTRIC LAMP SOCKET.

APPucATloN FILED DEc,9.1914.

1,251,739. C Patented Jan. 1,1918.

`3 SHEETS-SHEET I.

KZ/i266 5616,'

R. B. BENIAMIN.

ELECTRIC LAMP SOCKET. APPLICATION FILED DEc,9, I9I4.

Patented. Jan.y 1, 1918.

R. B l BENJAMIN. LECTRIC LAMP SOCKET.

APPLlcATloN FILED oms. 1914.

1,251,739. v Patene Jan. 1,1918.

3 SHEETS-SHEET 3.

UNITED stra'rns m REUBEN B. BEJ'AMIN, OF CHICAGO, ILLINOIS, ASSIGNOR T0BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO,

ILLINOIS, A. CORPORATION OF ILLINOIS.

ELECTRIC'LAMP SOCKET.

Specication of Letters Patent.

Patented dan. i, 1918.

Application filed December 9, lille. Serial No. 876,200.

To all-whom it may concern:

Be it known that I, BEUBEN B. Bianqmriu, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Imrovements in ElectricLamp Sockets, of whichthe following is a full, clear, concise, and exact description,reference being had to the accompanying drawing, a art of thisspecification.

lily invention relates to electric lamp\ sockets` and Ahas particularreference, rsti7 p to improvements in the casing whereby ar' unusuallystron rigid support is provide for the lamp, an second, to improvedmeansv for attaching the insulating base which carries the contacts tothe outer casing. In

devices of this class the casing is ordinarily constructed with twoparts, a body portion and a ca the cap being secured to the conduit orxture and the body portion being attached to the cap. The disadvantageof such a construction Vis that where heavy shades are carried by thesocket the parts of the casingr are liable to become separated from cachother, the body portion becoming loosened and falling with the shade orbeing left suspended by the leading in wires.

In the device hereindescribed and shown in the drawings I so constructthe body portion of the casing that it extends to and is secured uponthe conduit or fixture or upon a bushing which is secured on the conduitor fixture. I also provide means for rigidly securing the shade inposition by which it is attached directlyto the lower edge oi the casingwithout the use of a separate attaching ring as ordinarily used.

In the accompanying drawings, in which I have illustrated severalembodiments of my invention;

Figure 1 is an axial section substantially on the line 1-1 of Fig. 2,oi' a lamp socket showing the manner in which the threaded contact shelland the insulating base are secured within the casing;

Fi 2 is an axial section on the line 2 2 of Fig. 1 showing theelectrical connections between the leading in wires and the center andshell contacts;

Fig. 3 is a section on the line 3-3 of Fig. 1. showing the manner inwhich the split washer is secured in the casing;

forming Fig. 4 is a bottom view of the socket showing the relativeposition of the screws for securing the parts together;l

Fig. 5 is a plan view of the insulating base which carries the bindingscrews;

Fig. 6 a perspective view of one of the nuts by which the insulatingbase is secured to the split washer;

Fig 7 is an axial section of a Inodilied orin of my device in which thecasing is provided with a 4threaded portion for engagement with a shadeor shade holder, and showing the means for securing the insulating basein the casing;

Fig. 8 is a section on Fig. 7

Fig. 9 is a section on the line 9-9 of Fig. 10, showing the electricalconnections between thc leading in wires and the center and shellcontacts;

Fig. 10 is a section on the line lO-10 of Fig. 9 showing the relativepositions of the binding screws and the screws which secure the base inposition;

Fig. 11 is an axial section showing still another modification of mydevice and showing the incans by which the insulating base is secured tothe casing;

Fig. 12 is a section on the line 12--12 of Fig. 11; and

Fig. 13 is an elevatiiri of a modified form of casing provided with ahusk and shade holding` portion.

the line 8-8 of Referring now to the drawing in detail,

and first to the moditicaion of Figs. 1 to 6, theI socket comprises acasing indicated in general by 10 which is secured to a bushing 11 whichmay be screwed onto a conduit orv Y fixture carrying the leading inwires. Secured within the casing 10 is an insulating base 12 to which issecured a screw threaded contact 13 and an insulating cup 14 of fiber orother suitable material. The lower portion of the casing l() is providedwith an annular bead 15 for the purpose of retainthrough tee is tnreadedinter e af-Nin to mutiiete the l The insuieting esse i sion 34 forming esuppe* tact and preventing an?7 'posse the center Contact being' ercertnite er.`

gngeinent with the shell CentsetA ei' the center contact 35 is cess 3%in the base l2 'bein 0" te ey means ezt screw 37 en opening in the an@loindiing piste which is Tree-sited recess `35S-'in the upper or the i)s ,4 A binding screw engages tiie eine; x piste to heid the conductorin engagement there 1ith. The insulating' nase 12 also has s recess 41in its upper :tese in ed e bin-ding piste i Wiiier a binding` screw 18.i; s

opening 4e th engages the binding piste t Y 'er in position en the base.ins also serves to assist in iioidinef the @ne end .o shell eenteet andthe insninting e tion on the insulating base n described in detail. Thethreads tact 13 1nes an inwardly e'ztendin having openings the: e thescrews 355 extend te il@ plane en the buse eentaet has en opening se thescrew extends, '.nieii heiding' the sneil in p contact shell also has :Lto accommodate the e? l2. ,The fiber @up 3,4: nas r tending 5ft wbieiiis eisrn snge ai? and er Washer 52 is previded if( und the Cep portionuns QG from the easing 10.

'this niediieethe i6. The base 12 te heid the in position fen of PNs. 8,and l0 ndieates e cup shaped ung 56e in its upper xt ,s s bushing les inWires are nding seres/s. An insu.- seeiired. Within the easing tiresC. dsheii Contact 57 and bei insuietes the thread- The ioWer edge s threadedportion 59 'he Iewith for engageresded portion et e lamp .ier 60. Theinsulating l ieee within the easing 1 61 extending through .in thecasing end inte recesses tire isliistiiig base. The base 56 is prod withe eentrai extensien 64 forming e y for the Center contest (35, the end66' et" Q is secured in s recess 67 in the base means ef e iioiiow riveter eyeiet 68 extends through en opening in d' s pi te G9 te Awhich thebinding 70 is secured. The threaded Contact upper end an inwsrdiy eXterd- Lsvins' openinv through i kbends inte engagement piste '7 withwhich. the

T9 in the bese 'TG and extending" through an epeningf 8() in said baseinto threaded en- "elnent with s ing' S1 secured Within the in; being'riveted over shown at Mtv extending' isnee 812 et its upper end n niesis heid in pisse between the threaded sneii contact S5 :md theinsulating base '(6. :in this inediiestic-n it 'will "ee noted that i2is `irst slipped inte piace g The iber cup 58 ber insuiating cup 83 hasan in-'

